yahoo-eng-team team mailing list archive

[Johnson Shi <1889112@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

cloud-init currently only supports reading and setting the Azure
apply_network_config option from disk (see
https://cloudinit.readthedocs.io/en/latest/topics/datasources/azure.html#configuration).

This means that for customers using images that have "Azure
apply_network_config" set to true on disk, there is no way for customers
to opt out of this behavior during VM deployment. This is because the
sole location that cloud-init reads for the "Azure apply_network_config"
option is from the disk.

For customers that want to opt out of this behavior, the mitigation for
customers would be to (1) deploy the VM, (2) ssh into the VM, (3) set
the "Azure apply_network_config" option to false on disk, (4) then
reboot the VM in order for the changes to take effect and prevent cloud-
init from applying network config on subsequent boots.

Since there is no way to opt out of this behavior on first boot, a good
feature request would be for cloud-init to support reading the "Azure
apply_network_config" option through cloud-configs passed in through
Azure instance metadata.

** Affects: cloud-init
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1889112

Title:
  cloud-init should support setting apply_network_config through Azure
  instance metadata

Status in cloud-init:
  New

Bug description:
  cloud-init currently only supports reading and setting the Azure
  apply_network_config option from disk (see
  https://cloudinit.readthedocs.io/en/latest/topics/datasources/azure.html#configuration).

  This means that for customers using images that have "Azure
  apply_network_config" set to true on disk, there is no way for
  customers to opt out of this behavior during VM deployment. This is
  because the sole location that cloud-init reads for the "Azure
  apply_network_config" option is from the disk.

  For customers that want to opt out of this behavior, the mitigation
  for customers would be to (1) deploy the VM, (2) ssh into the VM, (3)
  set the "Azure apply_network_config" option to false on disk, (4) then
  reboot the VM in order for the changes to take effect and prevent
  cloud-init from applying network config on subsequent boots.

  Since there is no way to opt out of this behavior on first boot, a
  good feature request would be for cloud-init to support reading the
  "Azure apply_network_config" option through cloud-configs passed in
  through Azure instance metadata.

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